Next 6-Series Coupe is expected to debut at Auto Shanghai in the spring. The new 6-Series Coupe will be similar to the BMW Concept 6 Series Coupe which the automaker debuted at the Paris auto show last fall.

Here's a set of spy shots of the upcoming 2012 BMW 6-Series Coupe.

Our spy photographers managed to capture various white-colored prototypes out for test drives in the Munich area and even a got shot of one 6-Series Coupe equipped with a panoramic glass roof.

BMW is still masking the new design which has a more sloped rear end than the previous model that gives the large coupe more of a sports car look. The prototypes spotted here certainly have echoes of the BMW Concept 6 Series Coupe which debuted in Paris last fall. The shape of the model testing here is similar and that concept had a glass roof that ran all the way down that rear slope.

Expected under the hood will be BMW's turbocharged 3.0 liter inline-six dialed to the 320 bhp (239 kW / 324 PS) mark and a twin-turbo 4.4-liter V8 with 407 bhp (304 kW / 413 PS). Gearbox will be a choice of either a 6-speed manual or the 8-speed automatic.

The 2012 6-Series Coupe is set to debut at Auto Shanghai on April 19th.

Gallery: 2012 BMW 6 series Coupe spied with glass roof

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